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December 27> 1944 19 Dr. K. A. Koerber, John T. Levis and Brothers Co., 2545 Aramingo Avenue, Philadelphia, Pennsylvania. Dear Dr. Koerber s I am sending you herewith the result^o^our analyses on the blood samples of your patient Unfortunately these results do not permit us t^maK^an^very satisfactory interpretation. The lead concentration in the blood is definitely above normal limits, but it is in that middle ground which makes it rather uncertain. In view of the history that you have given me, I would be disposed to believe that this man ha3 been continuing a mild and not very significant exposure to lead compounds. However, I would be much safer in making this interpretation If I had adequate results on urinary samples. As I pointed out elsewhere, the range of values obtained on blood Is rather narrow, whereas that on the urine is much wider and permits a much more precise Interpretation to be made. I would consider it advisable to^obtain .additional samples on this man, both as a check on the possibility that the samples just analysed may have been slightly contaminated in the process of collection, and also as a means of giving an Interpretation of the course of a somewhat unusual and perhaps controversial case. For our own convenience In not carrying accounts, I am sending you herewith a bill to cover the cost of the analytical work. Cordially yours, EAK ef Enc. Fobert X. Kehoe, M. D. Kt 0013774 Robert A. Kehoe College of Medicine Eden Avenue Cincinnati 19* Ohio December 27* 1944 ohn !. Levis and Brothers Co., 545 Aramingo Avenue, hiladelphia, Pennsylvania. Attention: Dr*. K. A. Koerber Analysis of Blood for Lead 5.00 "a ro c-t 0 01J 1 j N16588.01 Satiplo of blood submitted by Dr. Tvenneth A. Koorber of the John ?. Lewis and iron. Company, 2$k5 Aramingo Avenue, Philadelphia, Pennsylvania, for lead analysis. Blood Analysis dumber M1A-6965 Grams 20.0 fpeotroK-raphic Mg. Pb/lOQ g. c.07 Pd thi zone 0.0O K 00JJ776 Sample Collected: 12-12-lsl; Sample Received: I2-Iu-I4.lt, Sample Reported: 12-25-ljlt. N16588.02